Patents by Inventor Jan Willem Verwijs

Jan Willem Verwijs has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Tubular reactor having static mixing elements separated by coalescing zones
    Patent number: 7303732
    Abstract: A tubular reactor characterized by having short static mixing elements separated by coalescing zones is used to conduct multiphase liquid/liquid reactions. Small droplets of one of the phases are dispersed into the other phase by the static mixing elements. These droplets coalesce and at least partially phase separate as the mixture passes through the subsequent coalescing zone. The tubular reactor is particularly suitable for nitrating organic compounds while forming low levels of improperly nitrated by-products and low levels of nitrophenolics.
    Type: Grant
    Filed: July 3, 2002
    Date of Patent: December 4, 2007
    Assignee: Dow Global Technologies Inc.
    Inventors: Paul A. Gillis, Helge Braun, Joerg Schmidt, Jan Willem Verwijs, Harald Velten, Kristina Platkowski
  • Process for conducting liquid/liquid multiphase reactions in a tubular reactor having static mixing elements separated by coalescing zones
    Patent number: 6562247
    Abstract: A tubular reactor characterized by having short static mixing elements separated by coalescing zones is used to conduct multiphase liquid/liquid reactions. Small droplets of one of the phases are dispersed into the other phase by the static mixing elements. These droplets coalesce and at least partially phase separate as the mixture passes through the subsequent coalescing zone. The tubular reactor is particularly suitable for nitrating organic compounds while forming low levels of improperly nitrated by-products and low levels of nitrophenolics.
    Type: Grant
    Filed: July 3, 2002
    Date of Patent: May 13, 2003
    Assignee: Dow Global Technologies Inc.
    Inventors: Paul A. Gillis, Helge Braun, Joerg Schmidt, Jan Willem Verwijs, Harald Velten, Kristina Platkowski
  • Process for ring nitrating aromatic compounds in a tubular reactor having static mixing elements separated by coalescing zones
    Patent number: 6506949
    Abstract: A tubular reactor characterized by having short static mixing elements separated by coalescing zones is used to conduct multiphase liquid/liquid reactions. Small droplets of one of the phases are dispersed into the other phase by the static mixing elements. These droplets coalesce and at least partially phase separate as the mixture passes through the subsequent coalescing zone. The tubular reactor is particularly suitable for nitrating organic compounds while forming low levels of improperly nitrated by-products and low levels of nitrophenolics.
    Type: Grant
    Filed: March 1, 2001
    Date of Patent: January 14, 2003
    Assignee: Dow Global Technologies, Inc.
    Inventors: Paul A. Gillis, Helge Braun, Joerg Schmidt, Jan Willem Verwijs, Harald Velten, Kristina Platkowski
  • Tubular reactor having static mixing elements separated by coalescing zones
    Publication number: 20030009064
    Abstract: A tubular reactor characterized by having short static mixing elements separated by coalescing zones is used to conduct multiphase liquid/liquid reactions. Small droplets of one of the phases are dispersed into the other phase by the static mixing elements. These droplets coalesce and at least partially phase separate as the mixture passes through the subsequent coalescing zone. The tubular reactor is particularly suitable for nitrating organic compounds while forming low levels of improperly nitrated by-products and low levels of nitrophenolics.
    Type: Application
    Filed: July 3, 2002
    Publication date: January 9, 2003
    Inventors: Paul A. Gillis, Helge Braun, Joerg Schmidt, Jan Willem Verwijs, Harald Velten, Kristina Platkowski
  • Process for conducting liquid/liquid multiphase reactions in a tubular reactor having static mixing elements separated by coalescing zones
    Publication number: 20020193642
    Abstract: A tubular reactor characterized by having short static mixing elements separated by coalescing zones is used to conduct multiphase liquid/liquid reactions. Small droplets of one of the phases are dispersed into the other phase by the static mixing elements. These droplets coalesce and at least partially phase separate as the mixture passes through the subsequent coalescing zone. The tubular reactor is particularly suitable for nitrating organic compounds while forming low levels of improperly nitrated by-products and low levels of nitrophenolics.
    Type: Application
    Filed: July 3, 2002
    Publication date: December 19, 2002
    Inventors: Paul A. Gillis, Helge Braun, Joerg Schmidt, Jan Willem Verwijs, Harald Velten, Kristina Platkowski
  • Tubular reactor, process for conducting liquid/liquid multiphase reactions in a tubular reactor, and a process for ring-nitrating aromatic compounds in a tubular reactor
    Publication number: 20010043894
    Abstract: A tubular reactor characterized by having short static mixing elements separated by coalescing zones is used to conduct multiphase liquid/liquid reactions. Small droplets of one of the phases are dispersed into the other phase by the static mixing elements. These droplets coalesce and at least partially phase separate as the mixture passes through the subsequent coalescing zone. The tubular reactor is particularly suitable for nitrating organic compounds while forming low levels of improperly nitrated by-products and low levels of nitrophenolics.
    Type: Application
    Filed: March 1, 2001
    Publication date: November 22, 2001
    Inventors: Paul A. Gillis, Helge Braun, Joerg Schmidt, Jan Willem Verwijs, Harald Velten, Kristina Platkowski